Move devtool doc from extensible to dev manual

[YOCTO #13417]

devtool is not directly tied to the Extensible SDK anymore, and
instructions in there can be split and added to the development manual.

This patch is a simple bulk move, except for the following:

- Intro added to the devtool.rst document (mostly copy-pasted from the
  devtool quick reference in the ref-manual).
- Figures renamed to remove "sdk-" from filenames.
- References to sdk-manual/extensible replaced by dev-manual/devtool.

Reported-By: Paul Eggleton <bluelightning@bluelightning.org>
(From yocto-docs rev: 044d3185b858fce1febcfe3a6834b883f9a598fa)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/documentation/migration-guides/migration-2.1.rst b/documentation/migration-guides/migration-2.1.rst
index 18b05b52cc..4d7aa15af5 100644
--- a/documentation/migration-guides/migration-2.1.rst
+++ b/documentation/migration-guides/migration-2.1.rst
@@ -382,7 +382,7 @@ These additional changes exist:
    removed at runtime).
 
 -  The
-   :ref:`devtool modify <sdk-manual/extensible:use \`\`devtool modify\`\` to modify the source of an existing component>`
+   :ref:`devtool modify <dev-manual/devtool:use \`\`devtool modify\`\` to modify the source of an existing component>`
    command now defaults to extracting the source since that is most
    commonly expected. The ``-x`` or ``--extract`` options are now no-ops. If
    you wish to provide your own existing source tree, you will now need